Show HAY 11 A new n of ot telegraphy without Wl do In Thi Th World null and Engineer It Ills Is hello though the ho light Ul d consists of ot the rays Instead of tiC tho visible ble hIe The Tho Is ono 1 err man The distinctive characteristic of th apparatus e ms to be the lenses that nr are used The Tho is 18 an nil ob nb from tho Iho article referred to 10 Tho TM material tt t the tho lemon lenscH must have havea hn a n high dielectric constant ana may Inn con of ie ln and Inti tike like I An fin Important observation made maJc is II thai Ih en cs to 10 be effective In concen concentrating I thu th tlc rays rny upon n object need not bo very In with the UI U Thus mirrors 9 0 leu 2 In for 0 IS S Inches and ond sig signals nals tan l n bo 0 exchanged al over oct miles At he a sim similar liar ilar leiU U I In fact tho apparatus Is Nn a It employing ot Unlit The dark taya s have hae the advantage of ot se dad of It not being win Intercepted III by tog fog or aro n an Mo obstacle n hut this can be over o lOme by n 1 of or relay The direction tion of Ihl tu can bo W clear ly 1 distinguished l to within a n degree and nn s may ilia thus thull 1 and t lot painted fUll alyo nr bo bt sent out simultaneously in directions It appears that a acl cl ar th nIl without In Int I t bodies Jodh l Is l Just JUll as nil In a |